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| author |   Ryan Hill <rhill@gentoo.org> | 2010-06-20 06:25:20 +0000 |
|---|---|---|
| committer | Ryan Hill <rhill@gentoo.org> | 2010-06-20 06:25:20 +0000 |
| commit | fdc2c66cd825515029904dc34df670825c252a4c (patch) | |
| tree | 1e57ba9370168b7992b3e12a09fdd24a54bc6c2c /4.5.0 | |
| parent | initial 4.4.4 patchset based on last 4.4.3 patchset (diff) | |
| download | gcc-patches-fdc2c66cd825515029904dc34df670825c252a4c.tar.gz gcc-patches-fdc2c66cd825515029904dc34df670825c252a4c.tar.bz2 gcc-patches-fdc2c66cd825515029904dc34df670825c252a4c.zip | |
Add upstream patch for bug #317513 (-march=native misdetects Core i? as atom).
Diffstat (limited to '4.5.0')
| -rw-r--r-- | 4.5.0/gentoo/30_all_gcc45-pr44046-core2-native.patch | 107 | ||||
| -rw-r--r-- | 4.5.0/gentoo/README.history | 1 |
2 files changed, 108 insertions, 0 deletions
diff --git a/4.5.0/gentoo/30_all_gcc45-pr44046-core2-native.patch b/4.5.0/gentoo/30_all_gcc45-pr44046-core2-native.patch new file mode 100644 index 0000000..a54ca56 --- /dev/null +++ b/4.5.0/gentoo/30_all_gcc45-pr44046-core2-native.patch @@ -0,0 +1,107 @@ +Core processors are misdetected as Atom by -march=native. + +http://bugs.gentoo.org/317513 +http://gcc.gnu.org/PR44046 +http://gcc.gnu.org/ml/gcc-patches/2010-05/msg00606.html + +Fixed upstream for 4.5.1. + +2010-05-09 H.J. Lu <hongjiu.lu@intel.com> + + Backport from mainline + 2010-05-09 H.J. Lu <hongjiu.lu@intel.com> + + PR target/44046 + * config/i386/driver-i386.c (host_detect_local_cpu): Properly + detect Atom, Core 2 and Core i7. + + +--- a/gcc/config/i386/driver-i386.c ++++ b/gcc/config/i386/driver-i386.c +@@ -538,34 +538,61 @@ const char *host_detect_local_cpu (int argc, const char **argv) + cpu = "pentium"; + break; + case PROCESSOR_PENTIUMPRO: +- if (model == 28) +- cpu = "atom"; +- else if (model >= 28 && l2sizekb < 2048) +- /* Assume it's a small core if there's less than 2MB cache */ +- cpu = "atom"; +- else if (has_longmode) +- cpu = "core2"; +- else if (arch) ++ switch (model) + { +- if (has_sse3) +- /* It is Core Duo. */ +- cpu = "pentium-m"; +- else if (has_sse2) +- /* It is Pentium M. */ +- cpu = "pentium-m"; +- else if (has_sse) +- /* It is Pentium III. */ +- cpu = "pentium3"; +- else if (has_mmx) +- /* It is Pentium II. */ +- cpu = "pentium2"; ++ case 0x1c: ++ case 0x26: ++ /* Atom. */ ++ cpu = "atom"; ++ break; ++ case 0x1a: ++ case 0x1e: ++ case 0x1f: ++ case 0x2e: ++ /* FIXME: Optimize for Nehalem. */ ++ cpu = "core2"; ++ break; ++ case 0x25: ++ case 0x2f: ++ /* FIXME: Optimize for Westmere. */ ++ cpu = "core2"; ++ break; ++ case 0x17: ++ case 0x1d: ++ /* Penryn. FIXME: -mtune=core2 is slower than -mtune=generic */ ++ cpu = "core2"; ++ break; ++ case 0x0f: ++ /* Merom. FIXME: -mtune=core2 is slower than -mtune=generic */ ++ cpu = "core2"; ++ break; ++ default: ++ if (arch) ++ { ++ if (has_ssse3) ++ /* If it is an unknown CPU with SSSE3, assume Core 2. */ ++ cpu = "core2"; ++ else if (has_sse3) ++ /* It is Core Duo. */ ++ cpu = "pentium-m"; ++ else if (has_sse2) ++ /* It is Pentium M. */ ++ cpu = "pentium-m"; ++ else if (has_sse) ++ /* It is Pentium III. */ ++ cpu = "pentium3"; ++ else if (has_mmx) ++ /* It is Pentium II. */ ++ cpu = "pentium2"; ++ else ++ /* Default to Pentium Pro. */ ++ cpu = "pentiumpro"; ++ } + else +- /* Default to Pentium Pro. */ +- cpu = "pentiumpro"; ++ /* For -mtune, we default to -mtune=generic. */ ++ cpu = "generic"; ++ break; + } +- else +- /* For -mtune, we default to -mtune=generic. */ +- cpu = "generic"; + break; + case PROCESSOR_PENTIUM4: + if (has_sse3) diff --git a/4.5.0/gentoo/README.history b/4.5.0/gentoo/README.history index 6d7ecae..12d8e7a 100644 --- a/4.5.0/gentoo/README.history +++ b/4.5.0/gentoo/README.history @@ -1,3 +1,4 @@ + + 30_all_gcc45-pr44046-core2-native.patch 1.1 17.05.2010 + 02_all_gcc45-pr42347.patch |